Timeline
Visit
The Wildcat Experience:
Sept. 16, 17, 18, 23, 24, 25, 30; Oct. 1, 2, 7, 8, 9, 21, 22, 23, 28, 29, 30; Nov. 4, 5, 6
Sept. 16, 17, 18, 23, 24, 25, 30; Oct. 1, 2, 7, 8, 9, 21, 22, 23, 28, 29, 30; Nov. 4, 5, 6
Click here for more information about the Wildcat Experience!
Visit
The Parent Experience:
Date based on your 8th grader's Wildcat Experience reservation
Date based on your 8th grader's Wildcat Experience reservation
Click here for more information about the Parent Experience!
Learn
Financial Assistance Applications Available:
Monday, Oct. 26, 2026
Monday, Oct. 26, 2026
Read more about the SI Financial Assistance program and apply.
If you need assistance, please contact the SI Financial Assistance office.
If you need assistance, please contact the SI Financial Assistance office.
Learn
CATS Information Night:
Wednesday, Nov. 11, 2026, 7 p.m.
Wednesday, Nov. 11, 2026, 7 p.m.
This session is for families who are interested in learning about the Center for Academics and Targeted Support (CATS). CATS is SI's program that supports students with learning differences and other challenges that impact learning.
Open to all SI applicants; signup is required.
Open to all SI applicants; signup is required.
Apply
Class of 2031 Application Deadline:
Monday, Nov. 16, 2026, by 11:59 p.m.
Monday, Nov. 16, 2026, by 11:59 p.m.
Click here for more details.
Apply
High School Placement Test (HSPT):
Saturday, Dec. 5, 2026, 9:00 a.m. - 12:30 p.m.
Saturday, Dec. 5, 2026, 9:00 a.m. - 12:30 p.m.
Read more about the HSPT.
Reserve your spot through your online application to SI
Reserve your spot through your online application to SI
Learn
Financial Assistance Information Session:
Wednesday, Dec. 9, 2026
Wednesday, Dec. 9, 2026
Get more information about the Financial Assistance application process.
Open to all SI applicants; signup required.
Open to all SI applicants; signup required.
Apply
High School Placement Test (HSPT) with Extended Time and Accommodations
Saturday, Dec. 12, 2026, 8:30 a.m. - 1:00 p.m.
Saturday, Dec. 12, 2026, 8:30 a.m. - 1:00 p.m.
Applicants with a documented learning difference or other diagnosis may be eligible for extended time testing and accommodations for the HSPT. Click here for more information on the HSPT with extended time and accommodations.
Apply
Financial Assistance Application Deadline:
Friday, Jan. 29, 2027
Friday, Jan. 29, 2027
Get more information.
This deadline is for families of ALL incoming students, even if a sibling is currently enrolled at SI.
This deadline is for families of ALL incoming students, even if a sibling is currently enrolled at SI.
Visit
Open House:
Sunday, Feb. 7, 2027, 4 p.m. - 5:30 p.m.
Sunday, Feb. 7, 2027, 4 p.m. - 5:30 p.m.
The Open House is for 7th and 8th grade students. Click here to learn more about this visit opportunity.
Decide
Admission & Financial Assistance Decision Notification:
Friday, March 12, 2027, 4 p.m.
Friday, March 12, 2027, 4 p.m.
Applicants and parents are notified online of admissions decisions and financial assistance awards.
Decide
Admitted Students Night
Monday, March 15, 2027, 6 p.m. - 7:30 p.m.
Monday, March 15, 2027, 6 p.m. - 7:30 p.m.
The Admitted Students Night is an opportunity for accepted students to get any and all questions answered by our SI community.
Decide
"Choose SI" Videos
Decide
Deadline to Enroll:
Friday, March 19, 2027, 6 a.m.
Friday, March 19, 2027, 6 a.m.
A non-refundable deposit of $1,600 is required to reserve a student's place in the Class of 2031. $1,500 will be applied to your tuition for the 2027-2028 school year.
Decide
Class of 2031 Registration:
TBD
TBD
Members of the Class of 2031 must complete their registration packets by the deadline.
Apply
Transfer Application Available:
Monday, April 12, 2027
Monday, April 12, 2027
Click here for more information on the Transfer Application Process
Apply
Transfer Application Deadline
Wednesday, April 28, 2027 by 11:59 p.m.
Wednesday, April 28, 2027 by 11:59 p.m.
Financial Assistance applications for Transfer applicants are also due on April 28, 2027 by 11:59 p.m. Click here for more information.